package com.sky.aspect;


import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import javassist.bytecode.SignatureAttribute;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.binding.MapperMethod;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MemberSignature;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

//切面类
@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    /*
    切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..))&& @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    /*
    通知
     */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint)
    {
        log.info("开始进行公共字段的填充");
        //获取当前被拦截的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//获取签名
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType=autoFill.value();
        //获得当前被拦截方法的实体对象
        Object[] args = joinPoint.getArgs();
        if(args==null||args.length==0)
        {
            return ;
        }
        Object entity=args[0];

        //获取准备数据赋值
        LocalDateTime now=LocalDateTime.now();
        Long currentId= BaseContext.getCurrentId();
        //根据不同的操作类型，为我们对应属性赋值
        if(operationType==OperationType.INSERT)
        {
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //通过反射为对象赋值
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
        else if(operationType==OperationType.UPDATE)
        {
            try {

                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //通过反射为对象赋值

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }

}
